Hesse, K.A. The Four rules of metric measures and time / by K.A. Hesse. - 24th ed. - London : Longman, 1998. - 78 p.: ill ; 25 cm. - Longman basic maths book . - A Longman basic maths book . ISBN: 0582181755 Subjects--Topical Terms: Mathematics--Measurement.Measurement.